Crushing-mill.



Nb. 650,097. Patented May 22, I900. m. J. E. BUTTER.

GRUSHI'NG MILL.

(Application filed June 19, 1899.) 7 (No Model.) 2 Sheets-Sheet l.

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No. 650,097. Patented May 22, I900.

1 MFJ. E. BUTTER.

CRUSHING MILL. (Application filed June 19, 189! (No Model.) 2 Sheets8heat 2.

I \HllllllHll I of a gyratory supporting bar or spindle which NITED STATES PATENT OFFICE."

MAX J. E. ROTTER, OF CHICAGO, ILLINOIS.

CRUSHlNG-MILL.

SPECIFICATION forming part of Letters Application filed June 19,1899.

To all whom it may concern:

Be it known that I, MAX J. E. ROTTER, a subject of the Queen of Great Britain, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Crushin g-Mills, of which the following is a specification.

My invention relates more especially to improvements in the mechanism for adjusting the crusher-head of a crushing-mill with relation to the crusher-liners; and my object is to provide improved mechanism for this purpose of a particularly simple, durable, and compact construction and readily operative to vary as desired the pulverization of the ore.

In the drawings, Figure 1 is a broken vertical section of a crushing-mill employing a gyratory crusher-head and showing my improved adjusting mechanism at the lower end carries the crusher-head Fig. 2, a section taken on line 2 in Fig. 1 and viewed in the direction of the arrow; Fig. 3, an inner face View of one of a pair of spiral cam-wheels, and Fig. 4 an end view of a-slide-block.

The crushingmill illustrated, excepting only those parts at the lower end, which form my improvements, is of well-known construction, involving a crushing-chamber A, having a removable liner A and supported upon a frame B. Surmounting the crushing-chamber are a feed=hopper C and tripodal bridge C, forming a loose bearing for the upper end of a bar or spindle D, which supports the crusherhead D.

E is a sleeve integral with a beveled gearwheel E and rotating in a bearing 13 in a bed-plate B at the lower end of the frame B. The center of rotation of the sleeve E is in vertical line with the center of the crushingchamber A, and the spindle D along its lower end portion passes loosely through an eccen tric opening in the sleeve, whereby in the rotation of the latter, effected through the beveled pinion F and drive-shaft F, the spindle and crusher-head are given a gyratory motion. The mill is 'mounted upon beams G, which rest on a suitable foundation G.

Suspended from the part B of the bed-plate Patent No. 650,097, dated May 22, 1900. Serial no. 721,137. (No model.)

B is a cylindrical casting 25, having bearings for a rotary cross-shaft s.

H H are wheels keyed or otherwise rigidly secured upon opposite ends of the shaft sbeyond the casting t and provided on their inner faces with coincident spiral cams or camgrooves r. The wheel H is provided, circumferentially, with worm-teeth q, which'mesh with a worm'q on a shaft 19. The shaft 12 is journaled in brackets n and passes through abearing in one of the beams G, beyond which it is provided with a hand-wheel p.

I is a bridge-piece or yoke provided at opposite ends with antifriction-rollers m, extending, respectively, into the cam-grooves r of the wheels H H. The casting 25 forms a guide or way for a cylindrical vertically sliding block K, provided at its lower end at opposite sides with notches Z, which fit over the upper surface of the yoke I. In opposite sides of the block, which is hollow, are vertically-elongated openings Z, through which the shaft 8 passes, and on the upper end of the block is a hardened disk K, upon which slides, eccentrically, a hardened button 71:. Set into the lower end of the spindle D is a hardened bearing block or toe 7c,'recessed on its under side to fit over the button It. The yoke I may extend through vertical slots 15 in the casting t and be guided thereby. The top of the block K is shaped like an oil-cup Z so that the button will slide in a bath of oil. If desired, a housing or casingi may be provided for the mechanism, as indicated in Fig. 2. The yoke I and slidingblockK form the support for the spindle D, and in the gyration of the latter the button slides on the disk K. The wheels H H and their connection-shaft form a cam device (actuated by turning the wheel 19) upon which the yoke I rests at its rollers m. Turning of the wheels and shaft causes the coincident cams 'r to raise or lower the yoke equally at its opposite ends to move the block K and spindle D, with the crusher-head D, up or down. Thus owing to the oppositely-fiarin g shapes of the crusherhead and crusher-chamber the product of the mill may be graded by turning the hand-wheel p. This construction of raising and lower ing mechanism for the crusher-head is partoo What I claim as new, and desire to secure by Letters Patent, is

1. In a crushing=n1ill, the combination with the crusher-head and its movable support, of

raising andllowering mechanism for the said head, comprising wheels provided on their inner faces with coincident spiral cams upon which the support rests, and means for turning said wheels simultaneously, substantially asdescribed.

2'. In a crushing-mill, the combination with the crusher-head and its supporting-spindle, of raising and lowering mechanism for the said head, comprising a vertically sliding block upon which the spindle is gyratively mounted at its lower end, a yoke supporting said block, a shaft, wheels rigidly connected to said shaft provided on their adjacent faces with spiral cams engaging the opposite end portions of said yoke, and worm and worm- Wheel rotating means for said shaft, substantially as and for the purpose set forth.

3. In a crushing-mill, the combination with the crusher-head and its supporting-spindle,

of raising and lowering mechanism for the said head, comprising a verticallysliding .block upon which the spindle is gyratively mounted at its lower end, a yoke supporting said block,a shaft,wheels rigid upon said shaft provided with coincident spiral cams engaging said yoke, worm-teeth on one of said Wheels, a worm engaging the worm-teeth, and an operating-handle for the worm, all constructed and arranged to operate substantially as and for the purpose set forth.

MAX J. E. ROTTER. In presence of EDW. S. BATEM-AN, R; T. SPENCER. 

